Air-escape valve.



No. 698,0l2. Patented Apr. 22, |902.

.A. GREVEL.

AIR ESCAPE VALVE.

(Application filed Sept. 13.. 1901.)

(No Model.`

witnesses.

TN: nomas versus co. Mom-urna., wnmuucm, l:A c.

nected with the system of air-pipes.

- and a suitable cut-0E contrivance.

UNITED I STATES PATENT OFFICE.

AUGUST GEEVEL, 'or COLOGNE, GERMANY.

vAIR-ESCAPE VALVE.

SPECIFICATION forming part of Letters Patent N 0. 698,012, dated April 22,v 1902.

Application iiled September` 13, 1901. Serial No. 75,349. (No model.) i i To all whom it may concern,.-

Beit known that I, AUGUST GEEvEL, merchant, residing at Cologne,Prussia,Germany, have invented Improvements in Air-Escape Valves, of which the following isL a specification.

The present invention is an escape-valve for applying air-brakes on railroad cars or trains while in motion from the road-bed.

The apparatus is fastened to a cylinder con- This cylinder is closed air-tight by means of a cap or cylinder-head screwed down onto a Washer or cylinder-head hangs on the threaded spindle,rpassing through a hinged and revolving lever, on the free end of which a way is provided for a roller on the end of the main lever. The accompanying drawings illustrate the new air-escape valve.

Figure l shows the side view in section.

Fig. 2rshows the end View.

rIhe cylinder a. is connected with the pipe system of the air-brakes. The iange b ofthe cylinder a carriesthe lever d, hinged or revolving in the bearing c, the lever d having a female thread for receiving the threaded spindle f, which lits into the valve g of the cap or cylinder-head h. The latter is fitted with an air-tight washer i, which is of rubber or other suitable material. The threaded spindle f is provided with a hand-wheel k,

which is fastened on with a nut Z. The pin n serves as a stop for the 'lever d. On the free end of the lever d, on the opposite end to the bearing e, a way 'm is provided for the ance or spring-lock can be of any other design.

The cap.

To make this apparatus ready for service, 45 place the cap or cylinder-head on the end `of the cylinder, with the washer i already in place, place the roller o of the main lever p on the way fm; of the lever d, place the spring u into position, and force the cap or cylinder- 5o head h into the end of the cylinder. by turning the hand-wheel 7c, attached to the threaded` spindle f. When the vlower end of the main lever 1J strikes a spur in its path,rthe roller ois freed from the way m, in conse- 55 quence of which the lever d, together withA the cap or cylinder-head and washer h t', is forced up by the air-pressure. This results vin the immediate application of the air-brakes, bringing the car or train to a stop.

The above-described apparatus needs no looking after and lcan remain in continual use for any length of time. With the exception of therenewal of the rubber washer 1I, which can last for years, the'air-escape .valve needs 65 no renewal of parts. g

Having now particularly described and asi certained the nature of my said invention and in what manner the `same is to be performed, I declare that what I claim is t An air-escape valve for operating the airbrakes of a car or train from the road-bed, the distinguishing feature of which is that the valve-cap or cylinder-head his fastened to a lever d by means of a threaded spindle 75 f and' through which thel cap or cylinder-head his held in place at the end of the cylinder a so that .the main lever p through its roller 0 bears upon the Wa'y m.

In testimony that I claim the foregoingfas my invention I have signed my name in presence of two subscribing witnesses."

y AUGUST GREVEL.

`-Witnesses: Y r

'CHARLES LE TEMPLE,

CARL SCHMIDT. 

